Valley Pan Gasket 05-19 Chevy LS

The Valley Pan Gasket 05-19 Chevy LS is a critical internal sealing component engineered for 5th and 6th generation small-block LS engines across Chevrolet's 2005–2019 lineup. Whether you're rebuilding a stock engine, performing routine maintenance, or deep-diving into a modification project, this gasket prevents coolant and oil seepage at the valley pan—the low point where the intake manifold meets the block. A compromised valley pan gasket allows fluid migration into the oil pan or coolant passages, leading to contamination, overheating, and potential catastrophic engine damage if left unaddressed.

Manufactured by MAHLE ORIGINAL/CLEVITE, a trusted OEM supplier with decades of sealing expertise, this gasket is precision-cut to match factory tolerances and material composition. The molded design accommodates the valley pan's unique geometry on LS engines, ensuring a flush, leak-free seal under thermal cycling and high-boost applications. MAHLE's engineering accounts for the expansion and contraction cycles that occur during sustained track duty, street performance, or turbocharged builds—conditions that stress inferior aftermarket gaskets. The compact 0.55-inch profile and precise 12.1 x 23.4-inch footprint guarantee fitment without modification or creative shimming, critical when working in the tight confines of the LS valley.

This gasket is essential for engine builders, performance shops, and home mechanics tackling intake manifold removal—whether for carburetor or EFI conversions, supercharger installation, or cylinder head work. Compatibility spans naturally aspirated, supercharged, turbocharged, and nitrous-equipped LS engines across Camaro, Corvette, Silverado, Sierra, and Cadillac platforms. Installation requires manifold removal and careful valley pan cleaning; proper torque sequence of the intake bolts ensures even clamping pressure and gasket longevity. Pairing this MAHLE gasket with quality sealant and correct assembly procedures prevents comebacks and guarantees durability through multiple heat cycles.